The option for the SharePoint 2013 workflow platform is not available because the workflow service is not configured on the server

I came across this scenario where I could not create a SharePoint 2013 designer workflow on just one of the site collection.

Turns out that it is an issue with the template used for creating the site and we need to enable a couple of hidden features to enable 2013 workflows.
Here is a code snippet to help you solve this issue.

function enableWorkflowHiddenFeatures() {
    [CmdletBinding()]
     Param(
      [Parameter(Mandatory=$True,
  ValueFromPipeline=$True)]
       [string]$spSiteUrl
       )
       BEGIN {}
    PROCESS
       {
            try{
            Enable-SPFeature -Identity WorkflowServiceStore –Url $spSiteUrl
            }catch{ Write-Host $_.Message -ForegroundColor Red }
            try{
            Enable-SPFeature -Identity WorkflowTask –Url $spSiteUrl
            }catch{ Write-Host $_.Message -ForegroundColor Red }
           
       }
       END {}
       
}

  enableWorkflowHiddenFeatures -spSiteUrl siteurl

Error Message : The option for the SharePoint 2013 workflow platform is not available because the workflow service is not configured on the server. Please contact your server administrator.